During Matt and Steve's match, Matt's mouth guard sometimes disappears from his mouth, then reappears without him retrieving it.
When Steve claims kickboxing helps him, he drops his arms to his sides. In the next shot, they are crossed.
When Summer and Steve first meet, the ocean is visible behind both of them in close-ups, despite longer shots showing them facing each other on the beach.
When Mitch flips Branson during their match, he turns his head slightly and it can be seen he's played by a stunt man and not David Hasselhoff.
Steve's mouth is not quite in sync with the words when he says "C'mon, c'mon!" during Mitch and Branson's match.
It isn't very believable that Mitch would be in, let alone win, an MMA fight after he spent the previous two episodes in a rehab hospital recovering from a spinal cord injury.